I have 9 2 month old chicks that I finally have outside in a yard bigger then they know what to do with. and they are still picking on 2 of the chicks. there picking at their butt feather to the point where there drawing blood. I sprayed them with that blue stuff everyone talks about but there still picking on each other. why with so much space are they doing this. I have raise 8 chicks before these 10 and I never had this much trouble before....please any ideas will help!!